I am a NEWBIE with Questions!

Hello all! I came across this website yesterday and I am so excited to have found it! I have a question if anyone can help me.... I am getting married this August in Cancun, Mexico and we are doing the unity sand ceremony. We are bringing the jar and vases (wrapped nicely) and the sand with us. But what I am concerned about is, how are we going to get the jar back with the sand in it? I am afraid that the plane ride will mix it all up and it will look terrible when we get back. Someone suggested that I have it shipped back to Buffalo where I live, but I'm sure that will mix the sand up too. I am stumped!! Thanks, Melissa